Rizk N N
Department of Anatomy, Saddam College of Medicine, Baghdad, Iraq.
J Anat. 1991 Apr;175:1-6.
The lower halves of the anterior abdominal wall of 40 human specimens of both sexes and various ages were studied. The anatomical features seen were widely variable and quite different from the conventional picture. The fibres of the posterior lamina of the internal oblique and transversus abdominis aponeuroses gradually shift from the posterior to the anterior rectus sheath starting from the level of the umbilicus down to the level of the symphysis pubis. Thus, these anterior laminae gradually increase in thickness at the expense of their posterior laminae. As a result, the arcuate line is absent. Instead, one or more of the following features could be seen: (i) A gradually thinned out but complete PRS. (ii) An ill-defined or double arcuate line. (iii) A complete PRS of nearly normal thickness. (iv) A dense well-formed transverse aponeurotic band crossing from one side to the other at the level of the umbilicus, symphysis pubis or midway between them.
对40具不同性别和年龄的人体标本的腹前壁下半部进行了研究。观察到的解剖特征差异很大，与传统描述截然不同。腹内斜肌和腹横肌腱膜后层的纤维从脐水平向下至耻骨联合水平逐渐从腹直肌鞘后层向前层转移。因此，这些前层厚度逐渐增加，而后层厚度相应变薄。结果，半月线不存在。取而代之的是，可以看到以下一种或多种特征：（i）逐渐变薄但完整的耻骨梳韧带。（ii）不明确或双重的半月线。（iii）厚度接近正常的完整耻骨梳韧带。（iv）一条致密且形态良好的横向腱膜带，在脐水平、耻骨联合水平或两者之间的中点从一侧横跨到另一侧。
